...We test against ember-source > 3.8. Try out v2.0.0. If it doesn't work or you don't have the right polyfills because you are on an older Ember version, then v1.4.9 will be your best bet. Ember Infinity is based on a component-service approach wherein your application is viewed as an interaction between your components (ephemeral state) and service (long-term state). As a result, we can intelligently store your model state to provide you the ability to cache and invalidate your cache when you need to. If you provide an optional infinityCache timestamp (in ms), the infinity service model hook will return the existing collection (and not make a network request) if the timestamp has not yet expired. ...